Nausea at 2 weeks after af started?

Hi girls. Af came at 6 mar but was due on 4 mar (got a Bfn on the day af was due. 2 days later, started normal Af). Last cycle (feb), we bd everyday from last day of af up till 1st march. Didnt have any af cramps (weird) but all other symptoms which I never ever had, all disappeared when af arrive. Now I'm in my fertile week but have been feeling nausea, urge to pee? Since hubby Is away since 1st march, we stopped ttc.